Acetic Anhydride → HCID 57785892, compound

HRID 1628869Notes

Reaction equation

HRID 1628869 reaction equation
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:16]4[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[CH:18][C:17]=4[Cl:24])[CH2:12][CH2:13][CH2:14][CH2:15][N:7]3[C:6]=2[C:5]([CH:25]([OH:28])[CH2:26][CH3:27])=[CH:4][CH:3]=1.[C:29](OC(=O)C)(=[O:31])[CH3:30]>N1C=CC=CC=1>[C:29]([O:28][CH:25]([C:5]1[C:6]2[N:7]3[CH2:15][CH2:14][CH2:13][CH2:12][N:11]([C:16]4[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[CH:18][C:17]=4[Cl:24])[C:8]3=[N:9][C:10]=2[C:2]([Cl:1])=[CH:3][CH:4]=1)[CH2:26][CH3:27])(=[O:31])[CH3:30]

Participants

4

Reactant 2

HCID 7918Acetic AnhydrideHCID 57786260HCID 57786260, compound

Product 1

HCID 57785892HCID 57785892, compoundYield 83.1%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a stirred solution of 1-[10-chloro-1-(2-chloro-4-methoxyphenyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-7-yl]propan-1-ol (136 mg, 0.325 mmol) in pyridine (1.0 mL) was added acetic anhydride (92.2 μL, 0.975 mmol) at room temperature. After 24 h, the reaction mixture was quenched with aqueous sodium hydrogen carbonate, diluted with ethyl acetate, washed with water, hydrochloric acid (1 M) and brine, dried over sodium sulfate, filtrated, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture to give the title compound as a colorless solid (125 mg, 0.270 mmol, 83%). Analytically pure material was obtained by recrystallization from ethyl acetate/hexane.

Workup

  1. customthe reaction mixture was quenched with aqueous sodium hydrogen carbonate
  2. additiondiluted with ethyl acetate
  3. washwashed with water, hydrochloric acid (1 M) and brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltrated
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record
ord-ef5abc55eebf43619d38a9e6b6061cb4
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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